On Thu, Feb 08, 2018 at 11:04:22AM +0100, Jiri Slaby wrote:

On 01/19/2018, 06:42 PM, Dmitry Torokhov wrote:

quoted

Please pull from:

	git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input.git for-linus

to receive updates for the input subsystem. You will get:

...

quoted

- touchpad on Lenovo T640p is switched over to SMbus/RMI

...

quoted

王振杰 (1):
      Input: synaptics - Lenovo Thinkpad T460p devices should use RMI

Hi,

one of openSUSE users with T460p reports that the touchpad is defunct
after resume in 4.15. psmouse.synaptics_intertouch=0 works around the
problem.

The problem is:
 kernel: rmi4_smbus 8-002c: failed to get SMBus version number!
 kernel: rmi4_physical rmi4-00: rmi_driver_reset_handler: Failed to read
current IRQ mask.
 kernel: rmi4_f01 rmi4-00.fn01: Failed to restore normal operation: -16.
 kernel: rmi4_f01 rmi4-00.fn01: Resume failed with code -16.
 kernel: rmi4_physical rmi4-00: Failed to suspend functions: -16
 kernel: rmi4_smbus 8-002c: Failed to resume device: -16
 kernel: rmi4_f03 rmi4-00.fn03: rmi_f03_pt_write: Failed to write to F03
TX register (-16).

The downstream bug is at:
https://bugzilla.suse.com/show_bug.cgi?id=1079862

Any ideas?

Hmm, maybe the seuence between psmouse and rmi/smbus is not quite right
on resume on that box. Can you ask the reporter to:

echo 1 > /sys/power/pm_print_times
suspend/resume

and send dmesg?

Thanks.

-- 
Dmitry